Well, dwditty, I couldn't find it at any of the Mudcat sponsors, either. The only place I know of that has it is Collectors' Choice Music, (800)923-1122. The two-CD sets are $24.95 per volume; and there are now 4 volumes, with 30 songs per volume. Their catalog has a package deal for volumes 1 & 2 ($44.95), but I didn't see one for 3 & 4 on their online catalog. Maybe they have a package deal for all four if you call.
I thought long and hard about getting it, but too many of the songs were duplicates of what I already had in the Smithsonian Folk Song America and the Warner Troubadours of the Folk Era collections. sounds like the Time-Life collection is a better deal, but it wasn't available when I bought what I've got.
Interestingly, Time-Life only has volumes 1 & 2 available on their Web site.
You'd probably be much better off inviting Bill D and Barry Finn over to sing you all the songs from Rise Up Singing, you know......
-Joe Offer-